Armor for electrical connecting plugs



AP 1- H. HERTZBERG 1,800,728

ARMOR FOR ELECTRICAL CONNECTING PLUGS Filed Jan. 8, 1927 Harry Hcrzz bcig INVENTOR ATTORNEY Patented Apr. 14, 1931 UNITED STATES PATENT orrlce HARRY HEBTZBERG, OF BROOKLYN, NEW YORK, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE M. PROP}? CO. INC., (3F NEVJ YORK, N. Y., A CORPOEATION OF NEW YORK ARMOR FOR ELECTRICAL CQNNECIING PLUGS Application filed January 8, 1827. Serial No. 159,822...

This invention relates to electrical circuit connecting devices and is particularly directed to attachment plugs.

Among the objects of this invention is to provide an electrical plug connector having a body of insulating material. and a metallic armor; of improved construction to protect the same, the armor comprising few and simple parts, which shall be cheap to manufacture, easily fitted toform a rugged protection for the connector, and practical and efiicient in use.

1 Other objects ofthis invention will in part be obvious and inpart hereinafter pointed out.

The invention accordingly consists in the features of construction, combinations of elements, and arrangement of parts which will be exemplified in the construction hereinafter described, and of which the scope of application will be indicated in the following claims.

In the accompanying drawing, in which is shown one of the various possible illustrative embodiments of this invention,

Fig. 1 is a front elevational view showing a plug connector fitted with an armor embodying the invention.

Fig. 2 is a side View of the armored plug,

partly broken awayto show the interior construction.

Fig. 3 is a front elevational view of one of the pair of identical improved armor plates.

Fig. 4 is a sectional view taken on line 4-4 of Fig. 3.

Fig. 5 is a top plan view of the armor section shown in Fig. 3.

Referring now more specifically to the drawings, the invention is shown applied to a connector plug 10 of any standard construction. As here shown, said plug 10 comprises a body portion of insulating material formed of two complementary parts or blocks 14a and 1412 which may be held together by one or more clamping screws 17. Between said parts, there is secured to extend from one end a resilient supporting member 11 for leads 12. The specific shape of the connector plug can be varied according to the purpose for which the connector is to be used and the at 13 which connect with the loads 12 and are adapted to detachably connect with terminals of electric appliances (not shown).

Preferably, the parts 14a and 14b of the plug 10 cooperate to form an inclosure 15 for the contacts 13, said parts being pressed or moulded into suitable form so as to meet or engage one another along a plane or other surface of contact 16.

An improved armor or guard is provided for the insulating body portion to provide a better wearing surface and to prevent injury to the plug. The armor is formed of sheet metal and substantially incloses the complementary plug parts, exposing only the upper portions of the plug to be grasped by the operator so as to avoid contact with the armor in the event the same should become ieated. The armor is secured to the insulating blocks by means of the fasteners or screws 17 passing transversely through the body portion which holds the plug parts assembled. Said screws, as here shown are arranged in spaced relation to each other and along a central longitudinal plane of the body.

For simplicity in assembling and manu facture, the armor is formed of two identical sections 18a and 185, the longitudinal edges of which meet along the plane of contact 16 of the insulation blocks. i

The armor is arranged to have resilient engagement with the screws 17 whereby the screws are caused to clamp the parts 140; and 14b of the body portion together to evenly conform to the latter regardless of certain variations which always arise in the manufacture of connector plugs of the split type. For

this purpose, ears or lugs19 are formed in the armor, these being preferably stamped out from said sections in the form of offset tongue 1 projections to provide resiliency. Said lugs extend inwardly of the armor sections into recesses 20. provided in the blocks 14a and r 7 which asyherefshown are hexagonal. Each lugrezite'nd's only partially around beneath a screwhead or nut so as to permit sw ngingthe lugs intoproper alignment with the screw and blocks. This construct-ion aifords great,

rapidity in the assembling of the device.

As seen from the drawing, the two lugs 18 are'p'referably provided for each armor section? one otthelugs is formed atthe lowest point "of a curve 22 on the upper portion of each section,-whilethe other or lower lug is made simultaneously with the punching of a heX'afgon opening-23 in the armor sections and lsadapted toregi'ster wlth oneof the correspondingrecesses in said blocks. The lugs Having thus desc ibe'jdj my inventlon', I

as new and desire to secure by'Letters claim are so positioned-with respect to the screws as to-extend inb'ack' to'back relation, as

shown in the drawing. This insuresthat the armor will beefi'ectively anchored atthe recesses. Ifcon'siderable tension isused on the screws, the lugs,"being free-ended, are adapted to actas a spring and will be deflected partially toward each other, making a good bearing contact withj'th'e insulating'blocks within 4 V =tl1-PQC6SS6S20. The lower-edge portions-of l the, armor sections-preferablyterminate flush with the surface of the'leading end of the e plug body so as to keep said end free from metaland thus''eliininate possible accidental short circuit. i r

" i It will thus beseen th'atthere'is provided a device in which the several obj ects of'this in-. vention are achieved; and 1 which is '"well v "adapted ,to 1neet the conditions of practical use.

resilient projection eiitending therefromy" and means co-operating with said projection for fastening said armor on said portion.

A plug connector comprising a body portion of insulating material having a recess an armor to protect said portion, said armor having a resilient memberJ extending into the recess and means co-operating with said member tor. tastefning Y armor said portion.

4. An armor adapted to be fitted; over the insulated body portion of a plug connector, said'armor comprising, two separable sections of ident cal 'constructioin-each section having a'pair of spring tongues, said tongues constituting alignment "means for snugly 'fit-' ting the armor'sectionsto said'hoidy portion,

and fastening means engaging said tongues 7 for retaining the parts forming said'body portion assembled. i 7' 7 i 4 v '5. In combination with a plug. connector having a two-Zpieceinsulating body portion securedtogether with fastening means, an armor for protecting said 'b'ody portion comprising two identicalsections formed of sheet material housingnsaid body portion,

each sectionh'aving an inwardly extending bent resilient: lug formed integrally with saidsection and engaging with said fastening means. I V

"In testimony whereof I afliz m-yisignature. i' f HARRY; HERTZBE'RGQ As vario us possibleembodimentsimight i mad-e ottheaboveinvention 'and asvarious changes might be made in the" embodiment above set forth, it is to be understood that all matter herein set forth or shown in the accompanying drawing is tolbe interpreted asfillustrative and-not in a limiting sense; 7

- Patent L 7:"

1; connector of the character described including a bodyportion of insulating.

Zterial having aflre'cess,.'aii ar orto protect said portion, said armor liavi ng a resilient lug extend ng into-the recess, and means co 'operating with lug for fastening said i armor on" said portion, said lug'feXthding only partiallyeround and beneath] said mea z V W 2. A 'plug connector comprising a body "portion ot-insulatingmaterial, air 'armOr to protect said portion, said: armor-having a 

